Imaged 18th February by Kevin Boyle at Newchapel Observatory in England
The UK, The Netherlands, Germany and Scandinavia are experiencing a series
of unusually bright and intensely colourful twilights.
Glorious twilights are sometimes caused by volcanic
dust ejected into
the stratosphere where the small particles scatter the high altitude
Europe's cold anticyclonic weather could have caused a build up of tropospheric
haze and aerosol that might have enhanced the twilight.
Another and now more likely explanation is light scattering by very
high and thin TypeI polar statospheric clouds, PSCs.
They require exceptionally low temperatures to form and these conditions have
existed over the last day or so.
Image ©Kevin Boyle, shown with